This circuit with two HT2030s powers 6 LEDs in a decorative flashing system. The circuit is from Electronics Now magazine, December 1997. The LEDs are fed in sequence.
This circuit was obtained from a Radio & Electronics Constructor from March 1976. The magazine no...
This buffered version of the previous circuit appeared in an article in the September 1989 Radio...
This circuit was found in a 1968’s publication and uses germanium transistors. Equivalents can be...